code: def ZigZagDecode(value):
      """Inverse of ZigZagEncode()."""
      if not value & 0x1:
          return value >> 1
      return (value >> 1) ^ (~0)
  
imports: import struct
  from google.protobuf import descriptor
  from google.protobuf import message
label_desc: Use image node_id 4 for calling a global function with example usage: ZigZagDecode(value) and returns: unknown, unknown